Can't create FrameBuffers withoud depth

[FROL256]

passing nullptr to last parameter of vk_utils::createFrameBuffers leads to validation layers errors

Validation: Validation Error: [ VUID-VkFramebufferCreateInfo-attachmentCount-00876 ] Object 0: handle = 0xdcc8fd0000000012, type = VK_OBJECT_TYPE_RENDER_PASS; | MessageID = 0xd452b83b | vkCreateFramebuffer(): VkFramebufferCreateInfo attachmentCount of 1 does not match attachmentCount of 2 of VkRenderPass 0xdcc8fd0000000012[] being used to create Framebuffer. The Vulkan spec states: attachmentCount must be equal to the attachment count specified in renderPass (https://vulkan.lunarg.com/doc/view/1.2.189.0/linux/1.2-extensions/vkspec.html#VUID-VkFramebufferCreateInfo-attachmentCount-00876)
Validation: Validation Error: [ VUID-VkFramebufferCreateInfo-attachmentCount-00876 ] Object 0: handle = 0xdcc8fd0000000012, type = VK_OBJECT_TYPE_RENDER_PASS; | MessageID = 0xd452b83b | vkCreateFramebuffer(): VkFramebufferCreateInfo attachmentCount of 1 does not match attachmentCount of 2 of VkRenderPass 0xdcc8fd0000000012[] being used to create Framebuffer. The Vulkan spec states: attachmentCount must be equal to the attachment count specified in renderPass (https://vulkan.lunarg.com/doc/view/1.2.189.0/linux/1.2-extensions/vkspec.html#VUID-VkFramebufferCreateInfo-attachmentCount-00876)
Validation: Validation Error: [ UNASSIGNED-CoreValidation-DrawState-InvalidRenderpass ] Object 0: handle = 0x555555eab0a8, type = VK_OBJECT_TYPE_COMMAND_BUFFER; | MessageID = 0xa1662b9 | You cannot start a render pass using a framebuffer with a different number of attachments.
Validation: Validation Error: [ VUID-VkRenderPassBeginInfo-framebuffer-parameter ] Object 0: handle = 0xdcc8fd0000000012, type = VK_OBJECT_TYPE_RENDER_PASS; Object 1: handle = 0xd897d90000000016, type = VK_OBJECT_TYPE_FRAMEBUFFER; Object 2: handle = 0x7ffff7be0be0, type = VK_OBJECT_TYPE_IMAGE_VIEW; | MessageID = 0xe02fa864 | vkCmdBeginRenderPass(): VkFramebuffer 0xd897d90000000016[] pAttachments[1] = VkImageView 0x7ffff7be0be0[] is not a valid VkImageView handle The Vulkan spec states: framebuffer must be a valid VkFramebuffer handle (https://vulkan.lunarg.com/doc/view/1.2.189.0/linux/1.2-extensions/vkspec.html#VUID-VkRenderPassBeginInfo-framebuffer-parameter)
terminate called after throwing an instance of 'std::out_of_range'