Annoying letters

How do i solve this and remove it? I do anything in it but its not working!! (anki app works after showing many like these. it’s happen only when i am using versions 2.1.55+).
In 2.1.54 version, this isn’t occur!

If you restart your computer, then start Anki, do you get the message right away? Or does it only happen after closing and then later re-opening Anki?

In both, either get these or directly anki open.

Inside anki sometimes show me this, I think there is abnormal add-on

If you start Anki while holding down the shift key as requested, do you get an error? If so, what does it say?

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