F5 LTM-VE

The two problems look to be unrelated.

First one, looks to be compatibility issue. In the past there was a pdf file with a matrix for old version, like 11.3.0, but now the documentation just points to a new one that only has 11.4.0 and above. Here is the new solution:

https://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/ve-supported-hypervisor-matrix.html

The second, if the error is coming from the F5 unit, looks to be access list in the management. As this is a VE you should have console access, Try the following command:

tmsh modify sys httpd allow replace-all-with { all }

If you still have problems, please provide more information.