Could not update to 2.1.8

Hello,
On on of my akaunting software, while upgrading to 2.1.8 from 2.1.7, It stops at 20 %. And I got following errors on web tools console and networks given in screenshot below.

https://prnt.sc/10qthqw ->20%download and stop
https://prnt.sc/10qtoka ->network on web dev tool
https://prnt.sc/10qtp5y ->on console on web dev tool

And I had problem on my report too. It was not opening and on changing app_debug to true on .env - It says -> undefined variable: start. The screenshot is below.
https://prnt.sc/10qtqck ->while opening reports. May this create a problem to upgrade to new version?
I hope to find solution for this.
Thanks.

Hello,
Just updating about this issue. By somehow, I am able to upgrade to 2.1.8. But there is some errors in console and networks in new version.

One error is given in screenshot here -> https://prnt.sc/10t3kek