Hi Shekhar,
You need to do ESS configuration for leave request - go to SPRO--> Personnel management --> Employee self service--> working time --> leave request and check all the nodes.
From table V_T554s_web, it looks that ESS configs are not at all set in place hence you need to first define rule group for your company code and then default the rule gruoup under WBMO feature.
Once that's done you need to maintain your absence types in V_T554s_web under your own created rule groups.
kindly go through the documentation part in SPRO and try doing the config first,
Hope this helps.
Regards