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Here is the answer from Uploadcare, if anyone have the same issue:
Most likely, the error is caused by this line of code in
uploadcare-vuehttps://github.com/tipeio/uploadcare-vue/blob/master/src/Uploadcare.vue#L141
The openDialog takes 3 arguments – files, tab, and options. The tab
argument could be omitted in versions < 3.8.1, but in the latest
version, omitting this argument leads to an error. We’re going to
release a fix in a few days. At the moment, you can try to roll back
to v3.8.0.
Source:stackexchange.com