After upgrading from APEX 24.2 to 26.1.1, we are experiencing an issue with a page, after refreshing Universal Theme. The page runs successfully, but attempting to edit it in the Builder triggers the following error:

some information from debug log:
Exception in "getPageData":
Error Stack: ORA-01403: no data found
ORA-06512: at "APEX_260100.WWV_META_META_DATA", line 4222
ORA-06512: at "APEX_260100.WWV_META_META_DATA", line 2317
ORA-06512: at "APEX_260100.WWV_META_META_DATA", line 2386
ORA-06512: at "APEX_260100.WWV_META_META_DATA", line 2404
ORA-06512: at "APEX_260100.WWV_META_META_DATA", line 4554
ORA-06512: at "APEX_260100.WWV_META_META_DATA", line 5055
Backtrace: ORA-06512: at "APEX_260100.WWV_META_META_DATA", line 4222
ORA-06512: at "APEX_260100.WWV_META_META_DATA", line 2317
ORA-06512: at "APEX_260100.WWV_META_META_DATA", line 2386
ORA-06512: at "APEX_260100.WWV_META_META_DATA", line 2404
ORA-06512: at "APEX_260100.WWV_META_META_DATA", line 4554
ORA-06512: at "APEX_260100.WWV_META_META_DATA", line 5055
ORA-06512: at "APEX_260100.WWV_FLOW_PROPERTY_DEV", line 6211
%PROPERTY_DEV.emit_page_data_int:6243
%PROPERTY_DEV.emit_page_data:6315
:2
SYS.DBMS_SYS_SQL.execute:2120
SYS.WWV_DBMS_SQL_APEX_260100.execute:812
%DYNAMIC_EXEC.run_block5:2763
%CODE_EXEC_PLSQL.execute_int:130
%CODE_EXEC_PLSQL.execute:436
%CODE_EXEC.execute:553
%PPR_UTIL.run_process:238
%.show:3050
%.ajax:4494
Any Idea? Maybe it's the same issue with this https://forums.oracle.com/ords/apexds/post/issue-with-template-components-after-upgrade-to-26-1-possib-6899
Thanks,
Lukas