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Issue Arduino File Upload Error: Error compiling for board NodeMCU 1.0 (ESP-12E Module).

I am having an issue with the Arduino setup. Below is a copy of the Error Message: Error compiling for board NodeMCU 1.0 (ESP-12E Module). Arduino: 1.8.19 (Windows ...
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'RealtimeDatabase' does not name a type" error while compiling

Arduino: 1.8.13 (Windows 10), Board: "NodeMCU 1.0 (ESP-12E Module), 80 MHz, Flash, Legacy (new can return nullptr), All SSL ciphers (most compatible), 4MB (FS:2MB OTA ...