On using the public share URL receiving a "404" Error.
Possible reasons:
1. If the customer has upgraded from V3 to the latest might have missed running the data migrator.
2. If the customer is upgraded from V3 to the latest version and now updating to the latest this time also might have missed running the data migrator.
3. Might have deleted the "ANONYMOUS" from the DB level.
Solutions:
First
If the customer fails to run the data migrator, please inform them to run it and then check on the issue.
Second
If the customer still reports the issue is not resolved ask them to check if the "ANONYMOUS" is present or not at the Prolaborate DB level to check this, please follow the below instructions.
For MS-SQL
Step 1: Go to Prolaborate extend the table folder and you can find the dbo.Users table right-click on it and choose "Select Top 1000 Rows". user list will be listed in that list to verify whether ANONYMOUS" is present or not.
Step 2: If not present, please run the below query by using the "New Query" option > Then select the Prolaborate DB > copy and paste the above query and click execute.
INSERT [dbo].[Users] ([Id], [LDAPConnection_Id], [FirstName], [LastName], [UserRole_Id], [Status], [EmailId], [Password], [CreatedDate], [ModifiedDate], [Description], [ProfileImage], [CreatedBy], [ModifiedBy], [RegistrationMode], [Timezone], [IsPasswordSet], [IsAdmin], [ShowHelpText], [IdentityProvider_Id], [SecPhrase], [IsReadOnly], [UserIdentityRole], [UserName], [NormalizedUserName], [Email], [NormalizedEmail], [EmailConfirmed], [SecurityStamp], [ConcurrencyStamp], [PhoneNumber], [PhoneNumberConfirmed], [PasswordHash], [TwoFactorEnabled], [LockoutEnd], [LockoutEnabled], [AccessFailedCount]) VALUES (N'50E0FDA9-893E-4786-B84B-121EB6D02427', NULL, N'Anonymous', N'', N'ANONYMOUS', N'active', NULL, NULL, CAST(N'2021-10-07T18:39:47.317' AS DateTime), CAST(N'2021-10-07T18:39:47.317' AS DateTime), NULL, NULL, N'', N'', N'System', NULL, NULL, NULL, NULL, NULL, NULL, 1, NULL, N'Anonymous', N'', N'', N'', 1, N'75998310-c467-434d-8c9c-ec6ad6b6d143', NULL, NULL, 0, NULL, 0, NULL, 1, 0)

Step3: once the query is executed you will receive confirmation, you can check again the user table and then check on the public share URL issue.
Ticket Reference:
Ticket ID: #8443
URL: https://desk.zoho.com/agent/sixthforcesolutions/prolaborate-support/tickets/details/759413000031212001