Find the scope
Compare another channel and a movie. Note whether the issue affects one source or the whole player. Record the time, error and device; those details are more useful than repeatedly restarting everything.
Compare your network
Pause large downloads and try a wired connection where possible. Test on the viewing device, since a speed test on a nearby phone may use a different Wi-Fi band or signal.
Check connections and settings
Stop streams on other devices if you have reached your plan limit. Try a supported lower picture quality and check the player version. Change one setting at a time so you can see what helped.
Ask for targeted help
Share your findings with support. The team can check access and available servers. No subscription can guarantee identical playback on every home network, so testing your own setup matters.