Since the release of BPC 10.1, we have seen several incidents where the Web Administration links are not working. The main root cause is the installed BPC version is inconsistent with the installed SAP UI5 version.
Below are some steps that can help check the system if you are facing such behavior:
Ensure BPC and SAP UI5 are on compatible versions. Below you can find a table that compares BPC and SAP UI5 versions.
Delete redundant EPM folder. On SAP Note 2053377 you can find detailed steps on how to do so. *SAP UI5 team released a new correction for version 1.22 and the correct version now is 1.22.5 (See Note 2078274)
*If you mistakenly install SAP_UI SP12 then you will need to upgrade to BPC10.1 SP05 Patch 3 (NOTE: that SP05 Patch 1 and SP05 Patch 2 are prerequisites.