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1Don't put errors and code into images. Please edit your question, so we can read the code (and perhaps copy it to run it locally). – akop Jun 17 '22 at 06:49
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Maybe you can try to check if the database exists,you can refer to the [link](https://stackoverflow.com/questions/44666602/ef6-nullreferenceexception-with-any-tolist). – Yiyi You Jun 20 '22 at 08:25
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Judging based on limited information provided.
Simply put it means that you are trying to use something that doesn't exist.
Essentially this is returning a
null
value.
Without better question can't provide further help

Aeseir
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