[Koha] API Errors/Plugin Issues

[Jesse Stallings]

Running 21.05 (Debian package) and attempting to install the Pay via Paypal
plugin
<https://gitlab.com/thekesolutions/plugins/koha-plugin-pay-via-paypal> from
Theke. After uploading .kpz and flushing memcache/restarting Plack, the
configuration page hangs on loading files
from /api/v1/contrib/paypal/static/_nuxt/, which does not exist. API error
log is here <https://pastebin.com/DhJcTPGs>.

I suspect this is a larger issue with Mojolicious, but don't know enough to
be sure. As a shot in the dark, here are my current versions of Perl
modules mentioned in Bug 26893
<https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=26893>:
Mojolicious (7.21)
Mojolicious::Plugin::OpenAPI (1.15)
JSON::Validator (0.97)

Thanks for any help you can provide!

Jesse Stallings