LCS error An error has occurred. Please try again later. If the issue persists, please contact support with this Id: 859f43e3

I recently opened LCS and got following error when I clicked one of my D365FO environments:
"An error has occurred. Please try again later. If the issue persists, please contact support with this Id: 859f43e3-9f0b-44e3-b415-803d3dff998d"

There's nothing to worry about. This issue is from Microsoft side, just try again after some time (like half an hour or an hour); the error will be gone by itself. In case there's some urgent deployment going on do raise a ticket with Microsoft.

D365FO Unspecified error (Exception from HRESULT: 0x80004005 (E_FAIL))

While opening a table browser you may get this error sometimes saying,

"Unspecified error (Exception from HRESULT: 0x80004005 (E_FAIL))"

Even if you build the model is doesn't work.

Solution:

1- Close Visual studio

2- Open your solution and build

3- Try opening again

Remember you can always directly open table browser from you browser through link. For example, you can open custtable with following link in you development environment.

https://usnconeboxax1aos.cloud.onebox.dynamics.com/?mi=SysTableBrowser&prt=initial&limitednav=true&TableName=Custtable&cmp=USMF

in above link if you change name of custtable to any table it will open.

Thanks!

D365FO new custom module not showing

Problems Statement:

I had been able to create new modules by creating 'Menu' element, creating extension of 'MainMenu' menu and then referencing my custom menu there. I had deployed a new development VM with Product version Finance and Operations (10.0.5) and platform version 29, which was latest available till date (1st January 2020). I developed a new Menu the same way I used to do but it's not showing in Modules panel in left side. I built all the models and run db sync, still the problem exist.


Solution:

On my visual studio I set a display menuitem from that module as a startup project and ran with F5. It forced the module to show up.


References:
I asked this question on community when I faced the issue first.

https://community.dynamics.com/365/financeandoperations/f/dynamics-365-for-finance-and-operations-forum/376309/d365fo-new-custom-module-not-showing-in-update-29/998061#998061