Lua error in package.lua at [[package.lua#L-80|line 80]]: module 'Module:utils' not found

Backtrace:

[C]: in function "error"
package.lua:80: in function "load"
package.lua:99: in function "require"
Module:User:Vitalik/inflection:8: in function "init"
package.lua:103: in function "require"
Module:User:Vitalik/inflection/units/ru-noun/testcases:5: in function "init"
package.lua:103: in function "require"
Module:User:Vitalik/inflection/data/ru-noun/testcases/m:4: in function "chunk"
mw.lua:496: ?
[C]: ?