fixed : “This block has encountered an error and cannot be previewed” error in WordPress Dashboard

Question :

My website has been shifted to the revamped version of the WordPress Dashboard, but now, when I am trying to re-edit posts from before September 2020, I can only see the post’s title in the edit page… the body text is replaced by an error message saying “This block has encountered an error and cannot be previewed”.

What can I do to fix this ?

Answer :

The underlying problem is not exactly clear, but the solution is rather simple :

  • make sure you are running the latest version of macOS, if not : upgrade to the latest version of macOS
  • make sure you are running the latest version of Safari (or the browser you are using), if not : upgade to the latest version
  • open Safari
  • goto “View” (in the top menu bar)
  • click on “Reload without Content Blockers” (from the pulldown menu)
    • Note : the regular “Reload Page (CMD+R)” will NOT solve the problem !

That’s it !

enjoy 😉

fixed : get rid of Virus Infection warnings in

Question :
For some reason, my is flooding with red warning messages like “Your iPhone is infected”, “Virus detected”, “Critical Warning”, “Your iPhone is in danger” etc.

Is this true ?
Where did this come from ?
How can I get rid of these ?

Answer :

It is not a virus infection. These are not real iOS Error Messages. These are Calendar Events. You have recently clicked on some unreliable internet link that has subscribed you to an external event calendar…

To get rid of these, do this :

  • on your iPhone, open the
  • in the window that opens you will see your current appointments, and in the bottom-bar three buttons : “Today”, “Calendars” and “Inbox”
  • click on the “Calendars” button (bottom center)
  • in the pull-up screen that appears, you will see all Calendar-feeds that you have active
  • scroll down to the “Subscribed” chapter
  • if you have just one entry there, click on the coloured circle in front of it to remove the white checkmark
  • if you have more than one entry in the “Subscribed” chapter, click on the coloured circle in front of the top/first one to remove the white checkmark
  • then, click “Done” (top-right) to see if the error messages are gone
  • if they are, proceed – if not, redo the above step until the error messages have gone from your calendar
  • when you see that the error messages have disappeared from the regular Calendar view, click on the “Calendars” button (bottom center) again
  • then, in the pull-up screen that appears, scroll down to the “Subscribed” chapter again and click on the Info-button (encircled i-letter) that is at the right side of the name of the Calendar that you have previously unchecked (to make the error messages disappear)
  • in the “Edit Calendar” page that opens, scroll down completely and click on “Delete Calendar” (in red – completely at the bottom)
  • now, the pesky calendar subscription will be gone

That’s it !

enjoy 😉

fixed : 70mai A800 dashcam WiFi connection error

Question :

I just bought the best dashcam I could find for an affordable price : the Xiaomi 70mai A800 4K Ultra HD video with WiFi, GPS and ADAS driver assistance built-in.

I can’t get it to connect properly to my iPhone over WiFi however… I can find the 70mai WiFi network in the list of available WiFi networks in the iOS Settings-app, and I can connect to it, since it is shown as the connected WiFi-network… but the WiFi icon (the pie-shaped triangle) isn’t shown in the upper right corner of my iPhone… and when I startup the and click on the “70mai Dash Cam A800” in the “Please add 70mai devices”-window, I get an error : “Unable to get Wi-Fi connection Please enter [Settings – 70mai] to open location permission and then connect the device.” …and when I click on the “Go to open it”-button, the Settings-app opens …there I can set Wi-Fi, but that is already connected to the 70mai WiFi-network…

What is going on… how can I fix this ?


Answer :

The solution is simple, but you didn’t understand the given directions… probably because the the error message isn’t really straight forward : it’s in awkwardly translated English and the button only links halfway to where you need to adjust the settings…

First, make sure you are using the right iOS-app : you need the 70mai (Worldwide) app that can be downloaded here.

Then, do this :

  • connect the 70mai A800 dashcam to power
  • open the “System Settings” page (the icon is a hexagram with a dot in it)
    • Note that there’s no touch-screen so you should use the 4 buttons below the screen to navigate through the on-screen menu-structure
  • On the Settings page, you need to set “Wi-Fi hotspot” to “Enable” :
    • select “Disable” (at the top line, right of “Wi-Fi hotspot”)
    • in the “Wi-Fi hotspot”-page that opens you will see the name of the WiFi-network (at “Wi-Fi SSID”) and the WiFi-password (at “Password”)
    • remember these (or leave this screen open)

Then, open the on your iPhone and do this :

  • on the first page (simply called “70mai”) click the “Add device”-button (the only button on-screen)
  • in the “Please add 70mai devices”-page that opens, scroll down to “70mai Dash Cam A800” and click on it
  • when you get the “Unable to get Wi-Fi connection Please enter [Settings – 70mai] to open location permission and then connect the device.” error message, click on “Go to open it”
  • now the will open, but it won’t always on the same page inside the
  • so, make sure you go to the main Settings-page and clcik on “Wi-Fi” in the list
  • when the “Wi-Fi”-page opens, select the 70mai WiFi-network (with the name that was listed at Wi-Fi SSID”) from the list of “Other Networks” (or “My Networks”)
  • if the WiFi-password is required, use the “Password” that is (or was) displayed on the dashcam’s screen
  • now, even when the 70mai WiFi-network is connected you will still see 4G (or 3G or some other mobile data indication) instead of the WiFi-icon in the top-right corner of your iPhone screen
  • then click on “<Setttings” top-left
  • back in the main Settings-page, scroll all the way down to “70mai” (in the list of apps that starts after “Game Center”) and click on it
  • in the “70mai” page that opens, set “Location” to “While Using the App”
    • you could also set it to “Always”, but that isn’t a great idea since the 70mai WiFi-network is rather poorly protected
  • now, open the again
  • in the “Please add 70mai devices”-page, click on “70mai Dash Cam A800”
  • now, the “Turn on Wi-Fi hotspot”-page will open with a picture that resembles the “Wi-Fi hotspot” page that is displayed on the dashcam
  • there, you should click on “Dash cam WiFi hotspot is turned on” (eventhough it appears to be greyed-out) so a green checkmark will appear
  • then click “Next”
  • on the next page (the “Connect to WiFi hotspot”-page) click “Connect”
  • now the will open again, check that the 70mai WiFi-network is listed at “Wi-Fi”
  • then, open the and you will see a countdown-circle on your iPhone and you will hear a voice from the dashcam
  • so, go to the dashcam screen and tap the button bottom-right to confirm
  • now you will see what the dashcam is ‘seeing’ / ‘recording’ in the on your iPhone

…that’s it !

enjoy 😉

Note that you can adjust various dashcam settings (like the Speaker Volume, Video Resolution, Parking Surveillance, ADAS Driver Assistance, etc.) by clicking on the 3dot-icon top-right in the 70mai-app screen.




fixed : Dyson Pure Cool warning to replace new filters again ?

Question :

I have a Dyson Pure Cool 2018 ( TP04 ) fan-less air cooler / purifier, and it works great – I can even  monitor & control it from the on my iPhone. Now time has come to replace the HEPA and carbon filters, so I got a new set of those. I got the old wones out and put the new ones in, turned the Pure Cool back on, and now it keeps giving a ‘replace immediately’ warning again…

What is wrong ?


Answer :

You probably replaced both the carbonfilters and both the HEPA-filters just fine, as that is rather simple. But judging from the error message you are getting, you forgot to reset the software. To do so, do this :

  • unplug the Dyson Pore Cool 2018 ( TP04 ) from power
  • replace both carbonfilters (skip this if you just renewed them)
  • replace both HEPA filters (skip this if you just renewed them)
  • replug the power
  • switch ON (using the power button on the Pure Cool’s body)
  • press the ‘night’-button (bottom right) on the remote control until the countdown starts
  • wait for the countdown to finish
  • press the ‘left/right’-button (bottom left) on the remote control until the countdown starts
  • wait for the countdown to finish
  • you will now see green checkmarks for both filters on the display
  • press the ‘AUTO’-botton (middle right) on the remote control to put the Pure Cool back into automatic mode
  • use the for further settings (like using Siri or Alexa, Google Home is currently not supported)

that’s it !

enjoy 😉

Donate Button (MacManusNL)

fixed : iPad (or iPhone) “not charging” when charging cable is connected

Question :

My iPad is no longer charging when I connect it to the Lightning charger cable. I checked the cable and the charger with my iPhone, and when connected the iPhone charges without any problems. Still, whenever I connect my iPad, nothing happens… the charger is not recognised…

What can I do ?


Answer :

Because your charger and your Lightning charging cable are in good order (because they do charge your iPhone), there are 2 mayor options for this problem :

  1. the Lightning-port on your iPad (or iPhone) is broken
  2. there is a lot of dust in your iPad’s (or iPhone’s) Lightning-port

You should first check if your iPad’s Lightning-port is cluttered with dust by sticking a needle or paperclip’s end into the iPad’s Lightning port and gently scraping out all dust that has gathered there. You might need a torch-light to shine into the Lightning-port to make sure that all dust has been taken out. After doing so, hook up the iPad to the Lightning charger cable again… if the green battery and lightning icon appear on your iPad’s screen… if so, you have fixed this problem 😉
If not, just repeat the process by gently scaping all dust out off the Lightning-port and try again (to test).

If that still doesn’t work after multiple times of trial, you might have a hardware failure. If so, go to an AppleStore or an authorised Apple dealer (or your local Apple dealer).


Good Luck !

enjoy 😉