Question: I was using underscoreGS for a long time, but I got "Library with identifier underscoreGS is missing (perhaps it was deleted, or you don't have read access?)" this error suddenly.

underscoreGS should be a public lib, I should be able to access it. I also try to delete and add this to the project again, I can re-add it, but the error still there.

This is my code

```
  if (tmpDate.getTime() == tomorrow.getTime() && underscoreGS._indexOf(added, row[1], false) < 0){

```

Does anyone have the same problem? Or underscoreGS having a problem?

Answer: 
Provisional Solution
--------------------

From a comment on the same issue tracker mentioned by @Iamblichus

> 
> I don't know if the libraries can be brought back online. In the meantime, here are backups:
> 
> 
> ObjApp source code:
> <https://script.google.com/d/1fCGHsA4zJ3ow0U_LFJclWTP8ctgDuMCZIrQ0bFCchSAIpnjNbWrW_Vre/edit?usp=drive_web>
> Script ID (to use as library):
> 1fCGHsA4zJ3ow0U\_LFJclWTP8ctgDuMCZIrQ0bFCchSAIpnjNbWrW\_Vre
> 
> 
> GSUnit source code:
> <https://script.google.com/macros/d/1T4ao_R66gK5hK4dtKHT4p7kractojP2tYau9dOzcG7xJrYyl_gWiQ7a_/edit?usp=drive_web>
> Script ID (to use as library):
> 1T4ao\_R66gK5hK4dtKHT4p7kractojP2tYau9dOzcG7xJrYyl\_gWiQ7a\_
> 
> 
> underscoreGS source code:
> <https://script.google.com/d/1mBlMu5QzQSO0X3pGZHPBPfLYh5UuSRLETBb9x-EIyOzMPrd0SA-i7QdR/edit?usp=drive_web>
> Script ID (to use as library):
> 1mBlMu5QzQSO0X3pGZHPBPfLYh5UuSRLETBb9x-EIyOzMPrd0SA-i7QdR
> 
> 
> 

### Reference:

* [Issues with underscoreGS, GSUnit libraries, and others?](https://issuetracker.google.com/issues/176763313#comment5)
This is happening to me aswell just since yesterday for the ObjApp library but intermittently which makes me believe it is on Googles end