Most ESP32 boards ship with a 1.3 MB (1310720 bytes) application partition, unless a custom partition table is used. So if your firmware size is bigger than that, it won't compile.

Solution:

Change platformio.ini to use a partition layout with a 2 MB app slot.

board_build.partitions = partitions.csv

Create partitions.csv in your project root:

Option A - "huge app"

# Name,   Type, SubType, Offset,  Size,    Flags
nvs,      data, nvs,     0x9000,  0x5000,
otadata,  data, ota,     0xe000,  0x2000,
app0,     app,  ota_0,   0x10000, 2M,
app1,     app,  ota_1,   0x210000, 2M,
spiffs,   data, spiffs,  0x410000, 0x3F0000,

Option B - "no OTA"

# Name,   Type, SubType, Offset,  Size,     Flags
nvs,      data, nvs,     0x9000,  0x5000,
phy_init, data, phy,     0xe000,  0x1000,
factory,  app,  factory, 0x10000, 0x2F0000,
spiffs,   data, spiffs,  0x300000, 0x100000,

See [[Understanding ESP32 partition tables]] for more information.

Or have a look at those examples.