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 : Jaksta records .mp4 movies that QuickTime can’t play

Question :

I have been using Jacksta Media Recorder for a long time now, and it has always worked marvelously for me when I need to download a video. Jaksta can download nearly any online video that I can watch in Safari.

But recently, Jaksta does download the exact videos I want, but the downloads turn out to be .mp4 files that QuickTime hangs on when trying to play them…

What can I do ?


Answer :

The exact reason for this is unknown, but it might have something to do with the fact that not all browsers play HTML5-videos using the same technology.

It turns out that your solution is to use the Google Chrome (or Firefox) web browser – instead of Safari – with Jaksta running in the background. That way, when you play the online video in Chrome (or Firefox), the file that Jaksta downloads will be a .mp4 video that QuickTime can play without any problems.

That’s it !

enjoy 😉

fixed : Flash 11 needed on PowerPC Mac (for BBC iPlayer, Facebook video, etc.)

Question :

I was a happy user of BBC iPlayer, but it has stopped working on my G4 (or G5) PowerPC Mac, since the new BBC iPlayer version requires Adobe Flash 11, and the latest version of Flash released is version Player

Isn’t there any way for me to view Flash 11 content on my PowerPC Mac ?

Answer :

There is an unofficial version of Flash for PowerPC that tells websites it is Flash 11 to enable you to view Flash 11 content. This works for BBC iPlayer, Facebook video, YouTube video, Adobe Kuler and various other web services.

This will enable you to access Flash 11 content on your PowerPC Mac, but please be aware that modern video will still be stuttering on a G4 Mac… even with this trick… for YouTube viewing you might be better of using MacTubes ; go here for more info :…wered-g4-ibook/

Installing the unofficial Flash 11 is rather simple, but as always with ‘home-brewed’ software, using it is completely AT YOUR OWN RISK !

– first and foremost : BACKUP your Mac ; make a copy of your entire hard drive before you proceed (use TimeMachine for instance)

– after that, and ONLY after that backup being done, open Safari and download the edited Flash-plugin here :

–  then goto the download button in the upper right corner of Safari and click it

– then in the “Downloads” windows that opens, click on the folder named “FPforFBPPC”

– when the Finder opens, click on the alias folder named “Internet Plug-Ins” (this folder can also be found at [your hard drive] –> Library –> Internet Plug-Ins)

– inside that folder, right-click (= CTRL + mouse click) on the file named “Flash Player.plugin”

– in the popup menu that appears, choose “Compress Flash Player.plugin”

– you will now have a file named “Flash”, rename it to “Flash Player(original)”

– then right-click on the file named “Flash Player.plugin” and choose “Move to Trash”

– then quit Safari

– then go back to your downloads folder, click on the folder named “FPforFBPPC” once again, and right-click the file “flash Player.plugin” that’s in there

– from the popup menu choose “Label” and a color that indicates to you that this is not an original file (e.g. red or yellow)

– then drag the file “flash Player.plugin” onto the folder alias named “Internet Plug-Ins” that’s right below it

– then click on the file “READ FIRST.rtf” and read the disclaimer that the maker (called SteelBin) has for you !

– now reopen Safari and goto this website :

– there you can check if you see the video (at STEP1) and if your Flash Player Version is recognized as (at STEP2)

– if that’s okay, you’re done (don’t bother about STEP3 and STEP4)

(if you get any older version of Flash listed… repeat the procedure, and if that still doesn’t work, follow the instructions below for installing a web browser for PowerPC Macs that’s still being updated)

– Now you’re able to use BBC iPlayer and many other modern sites once again on you ‘old’ Mac !

Enjoy !

A big thanks to SteelBin for creating this, please donate to him if you wish to thank him for doing so…

…and a special thanks to Telford Moore for testing the BBC iPlayer with this trick


– if you have trouble using a website or web service because you still get an error that your browser is too old, start using a web browser for PowerPC Macs that is still being updated. You have two options :

Camino :

OmniWeb :

Note : even though it is suggested elsewhere on the web to combine the use of the unofficial Flash 11 plugin with the TenFourFox web browser, I would advice to not hack TenFourFox to do so… 

Yes, the big advantage of TenFourFox is that it is the closest you can get to the modern day Firefox, but the flipside is that it has plugins (like Flash and QuickTime) completely disabled for security reasons… they’re waiting for HTML5 to make plugins obsolete…

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