This site is facing technical difficulties

Whenever I try to create pdf or preview PDF invoice an error comes “this site is facing technical difficulties”.

upon Debugging through plugin option, the error details are attached below, can anyone help me to get rid off it, as my site is live so I want to resolve the issue as soon as possible.

Error Message fclose() expects parameter 1 to be resource, boolean given
Error Number 2
Error File /home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/phenx/php-font-lib/src/FontLib/BinaryStream.php
Error Line 78
Error Context []
Error Detail function:CatchShutdownHandler
class:RednaoWooCommercePDFInvoiceAjax
object:[object Object]
type:->
args:2,fclose() expects parameter 1 to be resource, boolean given,/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/phenx/php-font-lib/src/FontLib/BinaryStream.php,78,

file:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/phenx/php-font-lib/src/FontLib/BinaryStream.php
line:78
function:fclose
args:false

file:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/dompdf/dompdf/lib/Cpdf.php
line:2844
function:close
class:FontLib\BinaryStream
object:[object Object]
type:->
args:

file:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/dompdf/dompdf/src/Adapter/CPDF.php
line:986
function:selectFont
class:Cpdf
object:[object Object]
type:->
args:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/dompdf/dompdf/lib/fonts/DejaVuSans

file:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/dompdf/dompdf/src/FontMetrics.php
line:309
function:get_font_height
class:Dompdf\Adapter\CPDF
object:[object Object]
type:->
args:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/dompdf/dompdf/lib/fonts/DejaVuSans,10.5

file:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/dompdf/dompdf/src/FrameReflower/Text.php
line:197
function:getFontHeight
class:Dompdf\FontMetrics
object:[object Object]
type:->
args:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/dompdf/dompdf/lib/fonts/DejaVuSans,10.5

file:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/dompdf/dompdf/src/FrameReflower/Text.php
line:372
function:_layout_line
class:Dompdf\FrameReflower\Text
object:[object Object]
type:->
args:

file:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php
line:924
function:reflow
class:Dompdf\FrameReflower\Text
object:[object Object]
type:->
args:[object Object]

file:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/dompdf/dompdf/src/FrameReflower/Block.php
line:847
function:reflow
class:Dompdf\FrameDecorator\AbstractFrameDecorator
object:[object Object]
type:->
args:[object Object]

file:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php
line:924
function:reflow
class:Dompdf\FrameReflower\Block
object:[object Object]
type:->
args:[object Object]

file:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/dompdf/dompdf/src/FrameReflower/Block.php
line:847
function:reflow
class:Dompdf\FrameDecorator\AbstractFrameDecorator
object:[object Object]
type:->
args:[object Object]

file:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php
line:924
function:reflow
class:Dompdf\FrameReflower\Block
object:[object Object]
type:->
args:

file:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/dompdf/dompdf/src/FrameReflower/Page.php
line:141
function:reflow
class:Dompdf\FrameDecorator\AbstractFrameDecorator
object:[object Object]
type:->
args:

file:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/dompdf/dompdf/src/FrameDecorator/AbstractFrameDecorator.php
line:924
function:reflow
class:Dompdf\FrameReflower\Page
object:[object Object]
type:->
args:

file:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/vendor/dompdf/dompdf/src/Dompdf.php
line:836
function:reflow
class:Dompdf\FrameDecorator\AbstractFrameDecorator
object:[object Object]
type:->
args:

file:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/PDFGenerator.php
line:369
function:render
class:Dompdf\Dompdf
object:[object Object]
type:->
args:

file:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/PDFGenerator.php
line:350
function:render
class:RednaoPDFGenerator
object:[object Object]
type:->
args:

file:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/PDFGenerator.php
line:274
function:Generate
class:RednaoPDFGenerator
object:[object Object]
type:->
args:false

file:/home2/wajnbw0afzuc/public_html/wp-content/plugins/woo-pdf-invoice-builder/woocommerce-pdf-invoice-ajax.php
line:521
function:GeneratePreview
class:RednaoPDFGenerator
object:[object Object]
type:->
args:

file:/home2/wajnbw0afzuc/public_html/wp-includes/class-wp-hook.php
line:286
function:DiagnoseError
class:RednaoWooCommercePDFInvoiceAjax
object:[object Object]
type:->
args:

file:/home2/wajnbw0afzuc/public_html/wp-includes/class-wp-hook.php
line:310
function:apply_filters
class:WP_Hook
object:[object Object]
type:->
args:,

file:/home2/wajnbw0afzuc/public_html/wp-includes/plugin.php
line:465
function:do_action
class:WP_Hook
object:[object Object]
type:->
args:

file:/home2/wajnbw0afzuc/public_html/wp-admin/admin-ajax.php
line:173
function:do_action
args:wp_ajax_rednao_wcpdfinv_diagnose_error

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