I recently made some related fixes, so I recommend building the module from source and using that. I also have some additional improvements in an un-merged PR that @sunbiz will hopefully land at some point (but you could also try building from my fork) …
@teleivo I also had the same issue and to fix it, I updated the OWA path in administration > Open Web Apps Module > settings. Then configure the correct path for those fields:
App Base URL:http://IP:port/openmrs/owa or sometime NULL value in database global properties also work