Hi. Same error here.
$ liferea eglExportDMABUFImageMESA failed eglExportDMABUFImageMESA failed eglExportDMABUFImageMESA failed sys:1: Warning: g_atomic_ref_count_dec: assertion 'old_value > 0' failed sys:1: Warning: g_uri_is_valid: assertion 'uri_string != NULL' failed I'm also using the nvidia proprietary driver (525.125.06-2). Window manager is Fluxbox. Downgrading liferea to the previous version doesn't fix the error though. I also tested downgrading all libwebkit2gtk related packages to version 2.40.5-1. After that the content window works again. ~Tim