Unable to Check-In NWDS 7.5 to NWDI 7.0, See the error details below

We upgraded our EP systems to 7.0 to 7.3 then we have issue in connecting the NWDI via NWDS,

We have changed the SC dependencies as per EP 7.3 suggested in Note 1457908, and started using the NWDS 7.5 but now I am getting below error while check-in in open activities.

FAILED: CHECKIN on activity default_w_D05_shell_2e_com_CFP_HOMEPAGE_dev_inactive_u_inbni1_t_2018_09_06_05_13_19_GMT_91d6560f-b193-11e8-809b-a402b97a82ee failed : :Failed to execute operations. macro execution failed [cause: HTTP protocol error [cause: Parsing of the response body failed [reason: The content of elements must consist of well-formed character data or markup