STM32F0308-Discovery Error in initializing ST-LINK device. Reason: No device found on target - stm32

I just try to install my code to card and i keep getting this error
Target no device found
Error in initializing ST-LINK device.
Reason: No device found on target.
I just randomly keep randomly keep reverting firmware and updating from cubeide its somehow fixed but after i restart my pc and re-plug the card it giving me the same error. Why this is happening?

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While my emulator is running.
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Error in initializing ST-Link device. Reason: ST-Link DLL error

I'm trying to run one of the sample projects from Atollic's Getting Started Youtube tutorial. At the debugging stage, the captioned error shows up. I'm at a loss since my board is connected and the video doesn't mention anything about the hardware configurations.
Met the same error, though I'm using a different board (NUCLEO-L452RE). Solved this problem by clicking "ST-Link Update" in "Help" in STM32CubeIDE.

Error while install application in my device

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Error message
Couldn't register com.spaceo.pushnotificationtest with the bootstrap server. Error: unknown error code.
This generally means that another instance of this process was already running or is hung in the debugger
Okay your device was struck in debug mode on your previous installation due to some error. You need to restart your device and clean the project in xcode to install application in your device
This generally means that another instance of this process was already running or is hung in the debugger This statement clearly states what was the error so restart your device and try again
I also get this error, restarting my device solves the problem.

Bootstrap server error when running app on Device in Xcode4

Couldn't register taxsmart.MapTest with the bootstrap server. Error: unknown error code.
This generally means that another instance of this process was already running or is hung in the debugger
I get this Error when I try to install my app on my Device.
I already tried restarting Mac and device.
Also tried cleaning the app and re-building. But did not work for me.
Also I tried refering to this link but didn't help me.
Bootstrap Server Error in Xcode IPHONE
What can be done?
I restarted my Mac and my device and it worked.
You didn't mention specifically, so I'll ask: Have you tried manually deleting the application from the device? Tap and hold its icon. When they begin to wiggle, hit the x in the upper-left of the icon and confirm deletion.