Server maintenance would be performed tonight

PUBG Support team has tweeted they'll require to shutdown game servers tonight to perform the regular weekly maintenance.

[PC] Live servers will undergo routine maintenance for approximately 4 hours on Aug 25th, 5:30pm PDT / Aug 26th, 2:30am CEST.
Investigations into the performance issues reported by players are ongoing, we will provide an update as soon as we are able to.

— PUBG Support (@PUBG_Support) August 25, 2020

Investigation reports sounds intriguing, however it is most likely that the live game servers would be unplayable for a couple of days due to performance issues.