Not able to complete any Jenkins lab due to issue with jenkin

Hi, I am facing issue with jenkins. Since whenever download and install any plugins. Aster jenkins never come back and hang in “loading plugin extension”. refer to below snap. Anyone else face same and ow to fix it?

Jenkins is a bit clunky. Did you try refreshing the page? It should eventually load.

Hi Yes , did but when i refresh it show error and never come back. even if it open i am not able to do anything

This will happen if the lab expires.