Unable to add a new term to termbase/Multiterm - error message

Hi everyone! When trying to add a term while in the middle of a translation using Trados Studio I get the error message 'Multiterm is unable to add the entry.' This has been happening a lot. I also noticed that many terms which I already have in my termbase are not recognized in my source text, so I have to keep looking them up in my termbase. Any thoughts? I am using Studio Freelance 2021. Thank you so much!

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