press f12 ,we can see LanguagePackageVersion is invalid ,
you can find the reason from the table OrganizationLanguagePack in the database [orgname_mscrm]
while select all the columns from this table , you will find the version column has a null value ,update this column to a correct value can fix this issue.
Dynamics CRM shows invalid arguement
原文：https://www.cnblogs.com/tcli/p/11140806.html