Error while importing:
Error: Can't find end of central directory : is this a zip file ? If it is, see https://stuk.github.io/jszip/documentation/howto/read_zip.html
at d.readEndOfCentral (https://web.blockbench.net/lib/jszip.min.js:13:7005)
at d.load (https://web.blockbench.net/lib/jszip.min.js:13:8717)
at https://web.blockbench.net/lib/jszip.min.js:12:11837

What are you trying to open?
It looks like the file is corrupted

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