Failed to load resource / TypeError: null is not an object

[merkato]

QGIS 3.10
Xubuntu 19.10

Mapillary images and sequences loads and can be viewed on an map canvas, but go2mapillary window shows only "Operation canceled" message. If I click on link showed there - in web browser there's correct image.

More error messages in screenshots

[merkato]

http://nycz.beskidy.pl/repo/webinspector.png
http://nycz.beskidy.pl/repo/qgis_mapillary_error.png