RTC with UART, bus busy

If I'm using RTC (PCF8523) which uses I2C also as UART(SC16IS752) I keep getting error (if using each component separately it works as it should):

10:14:26.202 -> [D][esp32-hal-i2c.c:1345] i2cProcQueue(): Gross Timeout Dead start=0x28cf0, end=0x28d22, =50, max=50 error=1
10:14:26.202 -> [E][esp32-hal-i2c.c:318] i2cDumpI2c(): i2c=0x3ffbec1c
10:14:26.202 -> [I][esp32-hal-i2c.c:319] i2cDumpI2c(): dev=0x60027000 date=0x16042000
10:14:26.202 -> [I][esp32-hal-i2c.c:321] i2cDumpI2c(): lock=0x3ffb8568
10:14:26.202 -> [I][esp32-hal-i2c.c:323] i2cDumpI2c(): num=1
10:14:26.202 -> [I][esp32-hal-i2c.c:324] i2cDumpI2c(): mode=1
10:14:26.237 -> [I][esp32-hal-i2c.c:325] i2cDumpI2c(): stage=3
10:14:26.237 -> [I][esp32-hal-i2c.c:326] i2cDumpI2c(): error=1
10:14:26.237 -> [I][esp32-hal-i2c.c:327] i2cDumpI2c(): event=0x3ffb8600 bits=200
10:14:26.237 -> [I][esp32-hal-i2c.c:328] i2cDumpI2c(): intr_handle=0x3ffb8630
10:14:26.237 -> [I][esp32-hal-i2c.c:329] i2cDumpI2c(): dq=0x3ffb864c
10:14:26.237 -> [I][esp32-hal-i2c.c:330] i2cDumpI2c(): queueCount=2
10:14:26.237 -> [I][esp32-hal-i2c.c:331] i2cDumpI2c(): queuePos=1
10:14:26.237 -> [I][esp32-hal-i2c.c:332] i2cDumpI2c(): errorByteCnt=-1
10:14:26.274 -> [I][esp32-hal-i2c.c:333] i2cDumpI2c(): errorQueue=1
10:14:26.274 -> [I][esp32-hal-i2c.c:334] i2cDumpI2c(): debugFlags=0x00000000
10:14:26.274 -> [I][esp32-hal-i2c.c:311] i2cDumpDqData(): Debug Buffer not Enabled
10:14:26.274 -> [I][esp32-hal-i2c.c:354] i2cDumpInts(): Debug Buffer not Enabled
10:14:26.274 -> [I][esp32-hal-i2c.c:1130] i2cProcQueue(): Bus busy, reinit

My code.

#include <SPI.h>
#include <Wire.h>
#include <SC16IS752.h>

#define GPIO 0
#define EXP_PIN 21
#include "RTClib.h"

RTC_PCF8523 rtc;

char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

SC16IS752 i2cuart = SC16IS752(SC16IS750_PROTOCOL_I2C, 0x48);

void setup()
{
Serial.begin(115200);
Serial.println("Start testing");

pinMode(EXP_PIN, OUTPUT);
digitalWrite(EXP_PIN, HIGH);

if (! rtc.begin()) {
Serial.println("Couldn't find RTC");
Serial.flush();
abort();
}
rtc.start();

i2cuart.begin(SC16IS752_DEFAULT_SPEED, SC16IS752_DEFAULT_SPEED); //baudrate setting
if (i2cuart.ping() != 1) {
Serial.println("Device not found");
while (1);
} else {
Serial.println("Device found");
}

i2cuart.pinMode(GPIO, OUTPUT);
i2cuart.digitalWrite(GPIO, LOW);
}

void loop()
{
i2cuart.digitalWrite(GPIO, HIGH);
delay(1000);
i2cuart.digitalWrite(GPIO, LOW);
delay(1000);

DateTime now = rtc.now();
Serial.print(now.year(), DEC);

delay(5000);
}

@peter1ainternet
Installation and Troubleshooting is for Problems with the Arduino itself NOT your project. It says so in the description of the section. Therefore I have moved your post here.

You may want to read this before you proceed:-
how to get the best out of this forum