Error with mason image format in manage display

@Nelo_Drup,
Did you get this error on image upload? I tried uploading image and it works.

#2 This error appears when you want to see the block, for example, view it in the home

@Nelo_Drup,
Have you downloaded the library from https://github.com/DrewDahlman/Mason?
You have to unzip this mason-master folder to your libraries folder and renamed it mason.
Error should resolve.

@shailja179 Hello if I put the library and the best example is that if I create a view there it works normally, the problem is in a custom block type

I am using it with block type but its working fine. See the attached screenshot of block backend and frontend.
It may be something else at your end which is causing issue.

@shailja179, thanks.

@Nelo_Drup, I hope you can make it one way or another.

Unfortunately I couldn't reproduce it, either.

The best way is to clone the sample optionsets and adjust one at a time to avoid sudden breakages.
The samples are guaranteed to work.

Also there are troubleshooting you may want to check out:
https://git.drupalcode.org/project/mason#troubleshooting

Also press F12 for more errors. Be sure to fix them.