After resizing harddisk sda1 system isn' t working

Hello all together,

Short conclusion:
After resizing my harddisk, system doesn't work properly.

First I used Gparted to resize my hdd - It's in a VM (Proxmox):

After rebooting the system the patition /dev/sda1 seems to bee in read-only mode:

I did a filsystemckeck with a rescue system:

In this condition the system doens' work. No webinterface, ...

How can I fix this?
Any help apreciated

Thanks in advance

Problem is solved