Cannot read property 'tb' of undefined

Please provide a more detailed explanation of what you are trying to achieve,
what you have done so far, what works, what doesn’t work…

Please show your relevant blocks,
if relevant, your data or lists,
screenshots of the Designer screen or app in action,
so we can see what you are trying to do…

Right Click in Blocks Editor and select “Download Blocks as Image”
for the best image of your blocks.

thanks for your support

The error message began to appear when I made a copy of a number of screens through a program 7-zip
When I start moving between the screens, the error appears, and the program works without any problems