The eVendors system needs a language configuration to permit the user access in the correct way, maybe your Internet Explorer hasn’t this configuration and cause the next error:
"Length cannot be less than zero. Parameter name: length"
For that case is necessary that you do the next instructions in the Internet Explorer:
1) Access Tools in the menu of the Internet Explorer.
2) In the General section, give click on Languages.
3) Add a preference language, example: English (United States) [en-us].
The instructions will show in the next image:
